Feed mechanism for wood-turning lathes.



PA-TENTED APR. 7, 1908;

v c. H. WAYMOTH. FEED MECHANISM FOR WOOD TURNING LA THES.

APPLICATION FILED APR. 9, 1906.

3 SHEETS-SHEET 1.

TJZLQess e s PATENTED APR. 7, 1908.

C. H. WAYMOTH. FEED MECHANISM FOR WOOD TURNING LATHES.

APPLICATION FILED APR. 9, 1906.

3 SHEETS-SHEET 2.

HTl/ay 77m {/1 Wait I M No. 884,114. PATBNTED APR. 7, 1908; 0. H. WAYMOTH.

FEED MECHANISM FOR WOOD TURNING LATHES. APPLICATION FILED APR. 9, 1906.

3 SHEETS-SHEET 3.

umuum Turning mm STATES PATENT OFFICE."

CHARLES H. WAYMOTH, OF FITCHBURG, MASSACHUSETTS.

FEED MECHANISM FOR WOOD-TURNING LATHES.

. Specification of Letters Patent.

Patented April 7, 1908.

application filed April 9, 1906. 1 Serial No. 310,726.

To all whom it may concerns, j

Beit known that 1, CHARLES H. W Y- MOTH, a citizen of the United States, residing. at Fitchburg, -in the county of 'orcester and State of Massachusetts, have inventeda new and useful Feed Mechanismfor Woodspecification.

"mechanism for a lathe.

This invention relates to that class of.

lathes which are used for turning small duplicate parts from wood or other material.

The especial object of this-invention is to provide a simple, efficient and accurate feed To this endthis invention'consist-s of the feed mechanism for lathes, and ofthe combinations of ,parts therefor as hereinafter described and more particularly pointed out in the claims at the end of this specification.

In the accompanying-three sheets of drawings, Figure lis a side view partly broken away'of sufficient parts of alathe and its f driving connections to illustrate the applica tion of this invention thereto. Fig. 2 is a partial plan view of the same. Fig. 3 is a side view of the parts shown inFig. 4. Fig. 4 is-a detail'view of the operating connections for the feed-rack. Fig. 5 is a detail viewshowing the feed-pawls in their inoperative 'or lowered position. Fig. 6 is a plan view partly broken away of the parts shown in Fig. 5, and Fig. 7 is an end view of the I parts shown in Fig. 5.

-In a prior application for patent filed by me Sept. 27., 1904, Serial No. 226,235, I have shown and claimed an automatically operatingwood-turning lathe using roughing, shaping and cutting-off tools which occupy fixed positions longitudinally with respect to the athe-bed, and in which the stick or work to be operated upon is mounted in'a head-stock which is moved or fed longitudinally to present thework to the vtools.

A feed mechanismconst-ructed according to this invention has-been especially designed for use in the lathe covered by my aforesaid application for; patent.

It is to be underi stood,- however, that my feed mechanism is ap licable to other types of-lathes if desired.

v eferring 'to the accompanying drawings for a detail description of a lathe embodying this invention,-B designates the lathe bed 7 which is supported upon legs L in the ordinary manner.

Carried bythe bed B is a movable headstock H whichis-fed longitudinally to pre- Lathes, of which thefollowing is'awhich a ho 'w'it h said means for mounting said feed pawlsso that sent work to the tools by connections hereafter, described. The spindle of the head stock is provided with a chuck 10 for holding one end of the stick to be operated u on, and

the head-stock spindle also prefera ly carriesa facelate or fly-Wheel 1 1.

v The roug ing tool is mounted in a frame or fixture T while the shaping tools may be mounted in said frame in any of the ordinar or preferred manners. A circular saw S is provided for cutting off the finished ieces, and a spindle B may be used for dr' ing or otherwise sha ing the end of the stick.

As'herein ilustrated, power'may bea liedgto the lathe from an overhead shaft '12. I

llounte'don the shaft 12 is'a lon ulley' or drum 13 having a belt 14 for riving the head-stock spindle. The rear strand of thepasses through a guide or holder 15 v a rod 16 extending up from the belt 14 carried head-stock. Also fastened on the shaft 12 is apulley 17 for driving the circular saw by means of a belt 18. v carries a belt which runs, upon a step-pulley 21. Turning with the step-pulley '21 and preferably connected thereto by a clutchmechanism controlled from a starting handle 2Q -1s a pinion 27 whlchimesh'es wlth and drlves a large gear 29 secured on the feedshaft 30. Fastened upon the feed shaft 30' The track are two track cams 31 and 32'. cam 31 is connected to operate the s indie R, while the track cam 32 1s COI1I1C to operate. the feedin devices. These connectlons are most clearly shown in Fig.- 4. trated in this figure, the track cam 32 engages directly with and operates a slide 33. Carried by the slide 33 is a pin or screw 34 engaging a slot in the movable feed rack 35.

Threaded into the movable feed-rack 35, and

having their ends projecting into the slot are A small feed pulley 19 prior application for patent bee As illus- I ed, andutilizin'g a plurality of eed up to engage the rack.

bylits cam,

v.64) use of 65 the scope of my invention a.

they can all be moved ple andidirect way to out of operation as desired.

As shown in Figs. to 7 inclusive, in additionto the movable l'eed rack 35, I employ a holding rack 40 which is bolted or fastened in fixed position in the frame-work of the lathe. Bolted onto and extending down from the head-stock casting is a support 43,

jjand journaled at one end in the support 13 and at its other end in a plate e5'is a pivot shaft 46'. The end pivots of the shaft 46 are -.eccentric with res eat to the central part of the shaft which orms the bearings of th i pawls as hereinafter described.

Pivotally mounted onthe shaft 46 are anu nber of .pawls of graduated lengths. In the present instance one pawl 47 is illustratedas coop-- eratin with the movable feed-rack 35,.and four 0 such pawls 48 areillustrated as cooperating with the fixed holding rack 4-D. Each of the-pawls a7 and 48 is pointed at one end 52 for enga ing its rack, and isweighted at :53 so-that the same will be normally swung Carried by the stipp'ort 43 is across-piece or plate 44. -"Ir' orderto turn the eccentfiic pivot shaft of thefeedpawls so that said awls may be raised or lowered as desired, a liub 49 is fas- 39 tened on the pivot shaft, and extending up i from the-hub 49 is a handle carrying a weight 50. When the weight 50 is thrown to one side of its central position, the pivot shaft will. be turned to lower the pawls to the position illustrated in Fig; 5,in which the weighted ends of the pawls rest on the cross-piece or table, so that the pawls will be disengaged from their racks.

thrownto the other side of the ivot shaft,

the centers of the pawl will be 1' ted so that screw 42.

By utilizing aiixed holding rack in addi- .tion to the reciprocating feed-rack, I am enabled to prevent any moving backof the head-stock or other part which is to be fed.

In practice also I have found that by ivoting an eccentric shaft secure the feed pawls on and efiicient way of mov- .a very convenient ing the feed pawls into and out of operative position, and I secure this result without the springs or other pieces which are liable to ive out when subjected to wear.

that changes may be made in iorms of am aware applying my invention to various wood turning lathes without up; and down in a simt row them into and When the weight 50 isx to engage the rack, and

esaiia claims. I do not Wish, therefore, tobe limited to the particular lathe I have heipip shown and described, but

' What I .do claim and desire to secure by" Letters Patent of the United'States is 2- 1. Ina feed mechanism, the combination of a feed rack,"means forfreciprocating said rack, a movable head-stock, a pawl pivotally supported by said head-stockand adapted t9 engagethe teeth of said rack for transmit-- ting motion therefrom to the head stock,

means for bodily moving said pawl toward andfrom the rack, and means for positively holding the ,pawl away from the rack when the pawl is rsobodily moved from the rack 2'. In a feed mechanism, the combination of a feed rack having downwardly facing teeth, means for reciprocating said rack, a!

movable head-stock, a wl pivotally supported by said head-stocli-and having a portion projecting upwardly to engage the teeth, means for, lowering said pawl bodily from the rack, and means for positively.

holding said projecting portion of the pawl away from the rack when the pawl is lowered.

3. In a feed mechanism, the combination ofa feed-rack, means for reciprocating said rack, a sliding member, a pawl pivotally supported by said sliding member and adapted to engagethe rack, said pawl having a weight normally tending to hold the pawl against the rack, means for bodily moving the pawl toward and from means-for engaging said weight to positively hold the pawl from engagement with the rack when the pawl is moved bodilyfrorn the rack.

' 4. In a feed mechanism, the combination of "a feed-rack having downwardly facing teeth, means for reciprocating said rack, a movable head-stock, ,a pawl pivotally sup ported by said head-stockand having a portion projecting upwardly to engage the teeth, means for lowering said pawl bodily from the rack, and means for positively holding said projecting portion of the pawl away from the rack when the pawl is lowered,

said pawl having a weight normally tending to hold-its opposite endagainst the rack, said means for positively holding the pawl comprising a cross-bar adapted to engage said weight.

I 5. In a feed mechanism, the combination of a teed-rack, means for reciprocating said "rack, a sliding member, a shaft mounted in bearings 'su ported by said sliding member,

said shaft raving an eccentric portion, a

pawl pivotally supported by said eccentric portion, one end of said pawl being adapted t e other comprising a counter-weight to normally hold the said end in engagement with the rack, and a bar su ported by said sliding member shaft is turned to lower the pawl, whereby the pawl will be positively held from engagement'with the rack.

6. In a feed mechanism, the combination of a feed-rack, means for feeding-said rack, a sliding member having bearings, a shaft -mounted to turn in. said bearings and having an eccentric portion, a pawl mounted on sa1d eccentric port1on,-w ereby it may be bodily moved by the oscillation ofthe shaft toward and from the rack, and means for engaging-the pawl and positively holding it away from the rack when the shaft is turned to a certain position. a

7. A feed mechanism for. wood turning lathes comprising the fixture to be fed movably mounted on the lathe bed, a feed rack, means for reciprocating the same, a pivot shaft mounted in eccentric bearings, a cross bar and a weight carried by the pivot shaft and mounted so that when thrown to one side of the center it will raise the feed-pawl to operative position, and when thrown to the other side of the center the weight will I reston said cross-bar and lower the feed-pawl to-disengage it from the feed-rack.

8. A "feed mechanism. for wood turning lathes, comprising the fixture to. be fed movabl mounted. on the lathe bed, a feed rack, an means for reciprocating the same, a holding rack fixed in the lathe frame-work, pawls of 'raduated lengths carried by the fixture to he fed, a plurality of such pawlsengaging the holding rack, and each of said pawls havingan operating toothat. one end, and a weighted portion at the other end, a crossa piece under said pawls, a pivot'shaft for the of a feed-rack, means 'for reciprocating said pawls mounted in eccentric bearings, and a weight for the ivot shaft which when thrown to one side 0 the center movesall of the pawls down to inoperative position, and which when thrown to the other side of the center permits the pawls to swing up to engage the racks. I 9. In a feed mechanism, the combination rack, a sliding' member, a shaft mounted in bearings supported by said sliding member, said shaft having an eccentricportion, a pawl .pivotally supported by said eccentric portion,

one end of sa1d pawl being adapted to engage the rack, and the other comprising a counterweight to normally hold the said end in enga ement with the rack, a cross-bar supported y said sliding member adapted to engage said Wei ht when the shaft is turned to lower the aw whereby the pawl will be positively hel from engagement with the rack, and means adapted to be connected with said pawl for preventing backward motion of the.

pawl and sliding member.

10. In a feed mechanism, the combination of a feed rack, means for reciprocating said -rack, a movable head-stock, a pawl ivotally supported by said head-stock and a apted to engage the teeth of said rack for transmitting motion therefrom to the head-stock, means for bodily moving said pawl toward and from the rack, means for positively holding the pawl away fromthe rack when the pawl is so odily moved from the rack, and means adapted to be connected with said pawl for positively preventing backward motion of said pawl and head-stock.

11. In a feed mechanism, the combination of a feed-rack, means for reciprocating said rack, a slidable member having bearings and having an eccentric portion, pawls mounted on said eccentric portion, whereby they may be moved towards and from the rack, and a ber, means for turning saidshaft and holding it in its extreme positions, said shaft having means for moving the pawls toward and from their respective racks, and a cross bar adapted to engage the pawls and hold them from engagement with their racks when the shaft is turned to a certain position.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

. CHARLES H. WAYMOTH. Witnesses:

AGNES P. BACHMANN, HARRISON BAILEY. 

